<!DOCTYPE html>
<html  lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>string</title>
</head>
   <h4>输出变量</h4>
<body>
	直接输出：<p th:text="${username}"/><br/>
	字符串拼接：<span th:text="${username}+' Hello World'"></span>
</body>
</html>